Provisional Specifications

Transcription

1 Provisional Specifications Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 1 of 46 Document(s): LMB-EG-07, S-E-05, S-E-06, E-31 Issue Date: Effective Date: Provisional specification for the approval of type of electricity meters and auxiliary devices used in determining standardized legal unit of measure values outside a meter 1.0 Scope This provisional specification applies to certain electricity meters and auxiliary devices submitted for approval pursuant to LMB-EG-07 Specifications for Approval of Type of Electricity Meters, Instrument Transformers and Auxiliary Devices. This specification will come into effect in accordance with the implementation period outlined in bulletin E Authority This specification is issued under the authority of section 12 of the Electricity and Gas Inspection Regulations. 3.0 References 3.1 LMB-EG-07 Specifications for approval of type of electricity meters, instrument transformers and auxiliary devices (1986) 3.2 S-E-05 Specification for approval of type of electronic meters Net metering 3.3 S-E-06 Specification for the approval of type of electricity meters and auxiliary devices amendments to Measurement Canada specification LMB-EG E-31 Implementation of policies and specifications relating to standardized electricity energy and demand legal units of measure

2 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 2 of Background This specification is established as a result of, and in accordance with, the Recommendations for Establishing Electricity LUM outside an Approved Meter Final Report, and Measurement Canada's Decisions VA JWG and LUM JWG Recommendations ( ). The approval aspects of those recommendations along with other related considerations have been adapted by the Complex Measurement Implementation JWG into the content of this specification, which is otherwise derived from specification S-E Amendments to sections of LMB-EG Amendments to section 1 Scope of LMB-EG-07 Reserved for future amendments to section 1 of LMB-EG Amendments to section 2 Definitions of LMB-EG Clause 2-23 is amended as follows: Display. A device or other means used to visually present the value of a measured quantity and other relevant information. It may take the form of an integral part of a meter or a separate display module Clause 2-34 is amended as follows: Minimum current The smallest load current for which a device must operate within specified error limits. The minimum current shall be taken to be 1% of I max (or less than 1% of I max if specified by the applicant) Clause 2-59 is amended as follows: Register (electronic) A memory location in the meter where the value of a measured quantity expressed in legal units of measure is electronically recorded. Register (mechanical) A mechanical device integral to the meter where the value of a measured quantity expressed in legal units of measure is recorded and visually presented Clause 2-17 is amended as follows: Demand interval (of an integrating meter or of a pulse recorder) The specified duration of time on which a demand measurement is based.

3 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 3 of Section 2 is amended by adding the following new definitions: Active energy Integral of active power over time (typically provided in units of watt hours). (Énergie active) Apparent energy Integral of apparent power over time (typically provided in units of VA hours). (Énergie reactive) Arithmetic totalization The addition of values having like units and direction of flow. (Totalisation arithmétique) Auxiliary device An independently housed device which is designed to work in conjunction with a source meter. (Dispositif auxiliaire) Auxiliary telemetering device An independently housed device which is designed to work in conjunction with a source meter or other measurement devices and systems for the purpose of making a measurement of, or obtaining the basis of a charge for the electricity or gas supplied. (Dispositif de télémesure auxiliaire) Conversion device or function A device or function that converts: legally relevant (LR) data to legal unit of measure (LUM) values, LUM values to new LUM values, and/or LR data to new LR data. A conversion device may also perform totalization. (Dispositif ou fonction de conversion) Data initiation A function within a source meter that provides legally relevant data in a format which is to be further processed inside the generating source meter or outside. The data can be pulse counts, or solid state data which is representative of a legal unit of measure value. (Génération de données) Data initiator A component within a source meter which performs data initiation. (Générateur de données) Data multiplier A constant (similar to disc constant - Kh or pulse constant - Kp) which is applied to legally relevant data to establish a processed legal unit of measure value used for billing. (Multiplicateur de données)

4 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 4 of 46 Data recorder An auxiliary device or source meter component that receives and stores energy legal unit of measure (LUM) values, or legally relevant (LR) energy data from one or more data initiator. The data recorder may: process LR data or LUM values; provide a means of indication; provide one or more interpretable outputs that can be converted into a processed legal unit of measure value. A data recorder may also be a conversion device depending on its functionalities. (Enregistreur de données) Data recording component A component within a source meter that records and stores legally relevant data. (Composant d enregistrement de données) Distortion power Power created by the product of voltage and current harmonics of unlike order. (Puissance de distorsion) Function An operation within a device which performs a specified action or results in a defined output. (Fonction) Fundamental frequency Nominal frequency of power generation. (Fréquence fondamentale) Harmonic power Power created by the product of voltage and current harmonics of like order. (Puissance harmonique) Interval data Contiguous time stamped legally relevant data that are stored in a data recorder. (Données sur la période d intégration) Legal unit of measure A legal unit of measure as defined in the Electricity and Gas Inspection Act and Regulations and which can be used for the sale of electricity. (Unité de mesure légale) Legally relevant data Information that is approved and verified to be representative of a legal unit of measure. This must be combined with a multiplier or other function to conclude a legal unit of measure value. (Données juridiquement pertinentes)

5 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 5 of 46 Legal unit of measure value A numerical value for a given amount of a legal unit of measure as defined above. (Valeur en unités de mesure légales) Maximum demand register A register in which the value of maximum demand is recorded. (Registre de puissance appelée maximale) Means of indication A mechanical register or a display. (Dispositif d indication) Netting The combination of signed energy values of opposite direction of flow. Mathematically this is signed addition. (Somme nette) Power Active, reactive and apparent power quantities are defined by the following equations for sinusoidal voltage and current: Active power (Puissance active) Watts: WW = VV XX II cccccc θθ Reactive power (Puissance reactive) Vars: vvvvvv = VV XX II sin θθ Apparent power (Puissance apparente) Volt-ampere (vectorial): VVVV vvvvvvvvvvvvvvvvvv = WW 2 + vvvvvv 2 where: V = voltage (root mean square) I = current (root mean square) θ = phase angle between voltage and current fundamental waveforms (Puissance) Processed legal unit of measure value A legal unit of measure value that has been derived outside a source meter from legally relevant data or from source legal unit of measure values, incorporating recognized units of measure, data multipliers and/or installation multipliers (as applicable), through a mathematical algorithm. (Valeur en unités de mesure légales calculées)

6 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 6 of 46 Reactive energy Integral of reactive power over time (typically provided in units of var hours). (Énergie réactive) Single-register, bi-directional meter A meter that is specified as capable of measuring both positive and negative mean energy flow, and where the net result will be placed in a single register. The process is equivalent to that of netting. (Compteur bidirectionnel à registre simple) Single-register, one direction only meter A meter that is specified as capable of measuring and registering either positive mean energy flow only, or negative mean energy flow only. (Compteur unidirectionnel seulement à registre simple) Sliding window A type of demand response whereby at the end of each new subinterval, the value of the oldest subinterval demand value is discarded, and a new demand value is calculated based on the sum of energy registered in the most recent contiguous subintervals which comprise the total demand interval. (Fenêtre mobile) Source legal unit of measure A legal unit of measure for which measurement is approved and verified within a source meter. (Unité de mesure légale source) Source legal unit of measure value A legal unit of measure value that is capable of being indicated by a source meter. (Valeur en unités de mesure légales sources) Source meter A meter which has been approved and verified to provide indication of any legal unit of measure values and/or initiate legally relevant data which are enabled and identified on the Notice of Approval for that meter pattern. (Compteur source) Test mode A mode of operation or output which facilitates meter accuracy testing by introducing shorter test periods and/or greater resolution of readings. The output of a test mode feature or operation is not the output used in establishing the basis of a charge for electricity legal units of measure during normal meter operation. (Mode d essai) Time stamped Refers to any data, values or intervals which have been subjected to time stamping. (Horodaté) Time stamping Applying a time attribute to legally relevant data, legal unit of measure values or contiguous time intervals. Time attribution can either be time of day (real time) or pre-set intervals (elapsed time). The time stamped data may then be transmitted and further processed outside of an approved device to establish demand processed legal unit of measure values. Time stamping may also be used to ensure energy totalization is performed on coincident values. (Horodatage)

7 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 7 of 46 Totalization A generic term encompassing both arithmetic totalization and netting. (Totalisation) Two-register, bi-directional meter A meter that is specified as capable of measuring both positive and negative mean energy flow, as defined by the connection of the meter, and where the positive result and negative result are placed in different registers. This has historically been referred to in Canada as a "bi-directional meter". (Compteur bidirectionnel à double registre) Var hour Is defined as the integral reactive power over time at the fundamental frequency. (Varheure) Var hour (delivered) Is defined as var hours when the phase angle between the voltage and current is between 0 and 90 (quadrant I), and between 90 and 180 (quadrant II). (Varheure (livré)) Var hour (quadrant I) Var hours delivered associated with watt hours delivered. The phase angle between the voltage and current is between 0 and 90 (quadrant I). (Varheure (quadrant 1)) Var hour (quadrant II) Var hours delivered associated with watt hours received. The phase angle between voltage and current is between 90 and 180 (quadrant II). (Varheure (quadrant 2)) Var hour (quadrant III) Var hours received associated with watt hours received. The phase angle between voltage and current is between 180 and 270 (quadrant III). (Varheure (quadrant 3)) Var hour (quadrant IV) Var hours received associated with watt hours delivered. The phase angle between voltage and current is between 270 and 360 (quadrant IV). (Varheure (quadrant 4)) Var hour meter An integrating instrument which measures reactive energy in var hours or in suitable multiples thereof. (Varheuremètre) Var hour (received) Is defined as var hours when the phase angle between voltage and current is between 180 and 270 (quadrant III), and between 270 to 360 (quadrant IV). (Varheure (reçu)) Volt-ampere hour Is defined as the integral with respect to time of the apparent power based on continuous measurement of active and reactive power. (Voltampèreheure) Volt-ampere hour (delivered) Is defined as volt-ampere hours associated with watt hours (delivered) or when the phase angle between voltage and current is between 0 and 90 (quadrant I), and between 270 and 360 (quadrant IV). (Voltampèreheure (livré))

8 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 8 of 46 Volt-ampere hour meter An integrating instrument which measures apparent energy in volt-ampere hours or in suitable multiples thereof. (Voltampèreheuremètre) Volt-ampere hour (received) Is defined as volt-ampere hours associated with watt hours (received) or when the phase angle between voltage and current is between 90 and 180 (quadrant II), and between 180 and 270 (quadrant III). (Voltampèreheure (reçu)) Watt hour Is defined as the integral of active power over time at the fundamental frequency. (Wattheure) Watt hour (delivered) Is defined as watt hours when the phase angle between voltage and current is between 0 and 90 (quadrant I), and between 270 and 360 (quadrant IV). (Wattheure (livré)) Watt hour (received) Is defined as watt hours when the phase angle between voltage and current is between 90 and 180 (quadrant II), and between 180 and 270 (quadrant III). (Wattheure (reçu)) Watt hour meter An integrating instrument which measures active energy in watt hours or in suitable multiples thereof. (Wattheuremètre) The following definition in section 2 is modified as follows: 2-46 Pulse initiator A data initiator used with a source meter to initiate pulses, the number of which is proportional to the quantity being measured. 5.3 Amendments to section 3 General of LMB-EG Clause (a), which requires the word "line" to be indicated on single-phase self-contained meters is revoked Clause is amended as follows: Multiplier. The meter multiplier, if other than one (1.0), shall be marked permanently and prominently, on the register face. Note: This requirement may be satisfied through physical marking or via electronic display.

9 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 9 of Clause is amended as follows: Clock registers. The minimum diameter of clock dial circles shall be 10 mm. Each dial shall be divided into ten equal and clearly numbered divisions. Preferably, the dials shall be distinctly separated from each other. The gearing shall be such that a complete revolution of any pointer shall cause the adjacent pointer on the left to advance one division. The dial centres shall be located so as to avoid any possibility of ambiguity in reading Clause is amended to remove the requirement that all windows in the register face lie in a straight line and be of the same size Cyclometer registers. The test dial of a cyclometer register may be of either the drum or pointer type. If the test dial is of the drum type, it shall be divided into ten equal numbered divisions, marked test dial, and a reference mark shall be provided on the register face for accurate reading. The arrangement of the cyclometer drums and the cutouts on the register face shall be such that, with the exception of the fastest moving drum, one and only one digit is in full view, except when a drum is advancing from one position to another. The duration of this change period shall not exceed the time required for the fastest-moving drum to make one-tenth of a revolution. The size and shape of any numerals shall be such that they are clearly legible Clause , Multi-rate registers, was revoked January 24, 2005, and replaced with PS-E-12 Provisional Specifications for the Approval of Type of Electricity Meters Approval Requirements for Electricity Meters with Multiregister Metering Functions The title of clause is amended as follows: Registers (mechanical) Clause is added to include requirements for electronic registers Registers (electronic). Electronic registers shall be non-volatile (they shall be capable of storing the last recorded value of a measured quantity if the meter is subjected to a power failure). Stored values shall not be overwritten and shall be capable of being retrieved upon restoration of power. Electronic registers shall be capable of storing measurement information in a manner which provides for at least five digits of resolution at the display.

10 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 10 of Clause is added to include the requirement for a means to indicate the value of any legal unit of measure recorded by the meter Means of indication. The meter shall have one or more means of indication capable of accurately presenting or displaying the numerical value of each LUM for which the meter is approved. The means of indication shall clearly and unambiguously indicate to which specific LUM unit the value is attributed (including direction or quadrant as identified in the definitions). Indication of the specific LUM unit for which a value is being indicated may be presented on the meter nameplate in combination with the means of indication Clause is amended as follows: Nameplates. Every meter, instrument or device shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly visible from the front, with all covers in place: (i) Name or mark of manufacturer (ii) Type or designation (iii) Serial number (iv) Departmental approval number (v) Operating temperature range Note: This requirement shall only apply if the operating temperature range is less than -40 C to +53 C (i.e., intended for temperature-controlled locations). This requirement may be satisfied through physical marking or via electronic display Space shall be provided for affixing the inspection number Additional marking requirements applicable to various types of meters and devices are set forth in subsequent sections specific to them Clause is amended by adding the following: Polyphase meters incorporating a single-direction register or pulse output shall determine net polyphase registration resulting from the combined measurements of all elements of the meter prior to applying any detent function which prevents registration or pulse outputs when energy is applied in the reverse direction Clause 3-6 is added to section 3 to clarify the technical definition of a LUM when utilized in a legal manner pursuant to the Electricity and Gas Inspection Act and Regulations.

11 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 11 of Definition of legal units of measure Unless otherwise specified in this document, all LUMs assessed for the purposes of electricity meter approval shall be as defined in the International System of Units established by the General Conference on Weights and Measures. Defined and derived units of measure are prescribed in Schedule I of the Weights and Measures Act. Assessed LUMs shall be traceable to LUMs established by standard apparatus in custody of the Minister and which form part of the system of reference standards. (Refer to Schedule IV of the Weights and Measures Act.) Clauses and are added to require the display of source legal unit of measure (SLUM) values The meter shall be capable of displaying corresponding energy register values for any SLUM which is approved to be used in establishing a processed legal unit of measure (PLUM) value The meter shall be capable of displaying corresponding demand register values for any SLUM which is approved to be used in establishing a PLUM value Clause is added specifically for meters intended to be approved as source meters which produce LR data for the purposes of establishing a PLUM value Each meter to be approved as a source meter and which includes an internal data recording component shall have a real time clock which is capable of being synchronized to a common time reference Subsection is added to clarify the application of performance requirements to meters based on direction of energy flow as follows: Directional measurement All performance requirements established in this specification apply in one direction of energy flow for a meter designated as "single-register, one direction only" All performance requirements established in this specification apply in both directions of energy flow for meters designated as "single-register, bi-directional" and meters designated as "two-register, bi-directional". 5.4 Amendments to section 4 Induction-type watt-hour meters of LMB-EG Clause was amended to remove the requirement that the direction of rotation be indicated by an arrow Direction of rotation. Viewed from above, the direction of rotation of the disc shall be counter-clockwise.

12 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 12 of Clause was amended to remove the requirement that every fifth division be longer than the others On self-contained single-phase meters, the disc shall carry the following markings, in black: On the upper periphery, one hundred divisions, with every tenth division identified consecutively by the figures 10, 20,..., Clause is amended to remove the requirement that the test dial be located out of line with other dials or be distinctly different in appearance. These requirements are redundant given the other requirements stipulated in this section Test dials. With the exception of meters equipped with a multi-rate register, all single-phase meters shall be provided with a special test dial for testing the register. In the case of polyphase meters, if the lowest reading dial or drum requires more than one hour to make one complete revolution when the meter under single-phase conditions specified in (vi) is running on maximum load or 100 A, whichever is lesser, a test dial shall be provided. The pointer of the test dial shall rotate at ten times the speed of the lowest reading dial or drum. There shall be no figures on the test dial but it shall be divided into ten equal divisions. The direction of rotation shall be indicated by means of an arrow Clause 4.3.2, Test Links, was revoked. Advances in technology have made it possible to facilitate the safe, effective and accurate testing of electricity meters without the use of test links. Electricity meters submitted to Measurement Canada for approval of type pursuant to specification LMB-EG-07 are not required to make use of test links Subsection 4-4 is amended as follows: Nameplates. In addition to the requirements of subsection 3-4, every meter used for single-point metering shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place. (i) Rated frequency a (ii) Rated voltage or voltages Note: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage. (iii) Minimum and maximum rated currents a These requirements may be satisfied through physical marking or via the meter s approved electronic display.

13 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 13 of 46 (iv) Disc constant a (v) Meter configuration notations, the following examples are recommended: 1-phase, 2-wire 1-phase, 3-wire 1-phase, 3-wire, 2-element 2-element network 2½ (2.5)-element wye or delta 3-element wye Auto detect Note: Accepted symbols are Ø, EL, Y and Δ. (vi) For single-phase transformer-type meters, the words "transformer type" (vii) For transformer-rated meters, (1) Primary disc constant a (2) Current transformer rating (e.g., A) a (3) Voltage transformer rating (e.g., V) a If the meter is fitted with accessories such as a reverse running detent or retransmitting contacts, this shall be specified on the nameplate or on an auxiliary plate, and a diagram of connections shall be provided. 5.5 Amendments to section 5 Induction-type var hour and q-hour meters of LMB-EG-07 Reserved for future amendments to section 5 of LMB-EG Amendments to section 6 Static integrating meters of LMB-EG Subsection was amended to clarify the requirements to facilitate efficient testing using conventional testing methodologies Testing Each meter shall provide testing means analogous to counting the disc revolutions of an induction watt-hour meter. A means of testing shall be provided for each energy quantity measured (e.g., W h, var h, etc.) Each meter shall provide pulses or some other form of discrete indication (e.g., light, KYZ, LCD, etc.) of energy accumulation registered by the meter. Each pulse or indication shall represent the same finite amount of energy.

14 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 14 of Each meter shall provide discrete energy accumulation indications, including pulses, in sufficient numbers and frequency to ensure that the time required to test the meter is comparable to the time required to test an electromechanical energy meter of the same load rating and configuration Access to the means for testing shall be available with the meter cover in place, without the need to break the verification seal at either the operational location or at another location Specialized test equipment that may be required to test devices which have unique testing means and are compliant with the above requirements shall be provided free of charge by the contractor, as prescribed under section 19 of the Electricity and Gas Inspection Act. The specialized equipment shall also be provided during the approval process by the approval applicant A comparative registration assessment between the value of energy presented by the meter s means of indication and the correlating value as determined through the meter s test provision shall result in a relative difference of 0.3% or less. The test shall be performed at any one test point used to assess performance requirements applicable to the meter type All performance tests for active, reactive and apparent energy meters shall be performed in each direction or quadrant for which the meter is to be approved Each register of a meter that indicates the direction of energy attributed to that register shall be assessed to confirm that the direction indicated is representative of the input voltage and current to which the meter is subjected. Additionally, the meter shall be assessed to confirm that the registers do not record LUM values which are representative of any direction other than that which is the identified one Subsection is added to include the requirements for approval of test mode for use during inspections of meters as follows: Test mode The test mode of electronic meters submitted to Measurement Canada for approval shall be evaluated to determine the extent to which it is suitable for meter verification testing The meter design schematics, operational block diagrams and other engineering and technical data shall be evaluated to confirm that there are no internal or external factors which can cause a difference between the resultant measured values obtained in the test and normal operating modes Each LUM evaluated for approval shall be evaluated in accordance with the requirements of clauses and , as applicable, for each mode of operation.

15 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 15 of The accuracy of the energy quantities shall be evaluated, as a minimum, in accordance with the test points and tolerance limits for each voltage, current and power factor specified in Table 1. For the purposes of evaluation, the voltage circuits shall be connected in parallel and current circuits connected in series, in a single-phase configuration. Table 1 Test points and tolerances for energy quantities in test mode Reference value of voltage (V), current (I), power factor (PF) Error tolerance limit of the difference between the test results in test mode and normal mode V maximum, 25% I maximum, 50% PF 0.2 V maximum, 2.5% I maximum, 50 % PF The accuracy of the demand quantities shall be evaluated, as a minimum, in accordance with the test points and tolerance limits for each voltage, current and power factor specified in Table 2. For the purpose of evaluation, the voltage circuits shall be connected in parallel and current circuits connected in series, in a single-phase configuration. Table 2 Test points and tolerances for demand quantities in test mode Reference value of voltage (V), current (I), power factor (PF) Error tolerance limit of the difference between the test results in test mode and normal mode V maximum, 50% I maximum, 50% PF Where the test mode is found to comply with clauses and , the Notice of Approval shall clearly indicate one of the following as applicable: (a) The test mode is approved for the purpose of verifying the performance and accuracy of energy measurement functions which have been approved as legal units of measure in this Notice of Approval. (b) The test mode is approved for the purpose of verifying the performance and accuracy of demand measurement functions which have been approved as legal units of measure in this Notice of Approval. (c) The test mode is approved for the purpose of verifying the performance and accuracy of energy and demand measurement functions which have been approved as legal units of measure in this Notice of Approval.

16 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 16 of Subsection 6-2 is amended to add clause as follows: Performance tests identified in section 6-4 shall be performed under sinusoidal, 60 hertz voltage and current conditions Clause is amended to remove the requirement that the information be indicated in red. The information shall be permanently and prominently indicated, irrespective of colour Clause is added to include the requirement that firmware versions be indicated as follows: Firmware versions. Meter firmware versions shall be prominently indicated either on the meter nameplate or via the electronic display Clauses and were added to include requirements for nameplates as follows: Nameplates for single customer meters. In addition to the requirements of section 3-4, every single customer meter shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place. (i) Rated frequency b (ii) Rated voltage or voltages Note: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage. (iii) Minimum and maximum rated currents (iv) Disc constant b (v) Meter configuration notations, the following examples are recommended: b 1-phase, 2-wire 1-phase, 3-wire 1-phase 3-wire, 2-element 2-element network 2½ (or 2.5)-element wye or delta 3-element wye Auto detect Note: Accepted symbols are Ø, EL, Y and Δ. (vi) For single-phase transformer-type meters, the words "transformer type" b These requirements may be satisfied through physical marking or via the meter s approved electronic display.

17 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 17 of 46 (vii) For transformer-rated meters, (1) Primary disc constant b (2) Current transformer rating (e.g., A) b (3) Voltage transformer rating (e.g., V) b In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed elsewhere on the meter, on condition that this same information also appears either inside or outside of the cover of an enclosure which shall be submitted as part of the approval of type application. In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed on the terminal cover on condition that this same information also appears elsewhere on the meter itself. In such a case, as a minimum, the serial number affixed on the meter itself shall be visible when the meter is installed. Meters approved with nameplate information not legible from the front of the meter shall be approved for installation only on the load side of the main switch or circuit breaker of the service for which the meter is installed. This installation restriction will be contained in the Notice of Approval If the meter is fitted with accessories such as a reverse running detent or retransmitting contacts, this shall be specified on the nameplate or on an auxiliary plate, and a diagram of connections shall be provided Nameplates for multiple customer metering systems. In addition to the requirements of section 3-4, every multiple customer metering system (MCMS) shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place. (i) Rated frequency c (ii) Rated voltage or voltages Note: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage. (iii) Minimum and maximum rated currents (iv) Disc constant c c These requirements may be satisfied through physical marking or via the meter s approved electronic display.

18 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 18 of 46 (v) The actual configuration of each meter, as programmed in the MCMS. The following examples are recommended: c 1-phase, 2-wire 1-phase, 3-wire, 2-element 2-element network 2-element, delta 3-element, wye Note: Accepted symbols are Ø, EL, Y and Δ. (vi) For single-phase transformer-type meters, the words "transformer type" (vii) For transformer-rated meters, (1) Primary disc constant c (2) Current transformer rating (e.g., ma) c (3) Voltage transformer rating (e.g., V) c In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter shall be placed elsewhere on the meter on condition that this same information also appears either inside or outside of the cover of an enclosure which shall be submitted as part of the approval of type application. Where the configuration information is not available on the nameplate or approved electronic display, the MCMS unit shall have a secondary nameplate, configuration chart or supporting documentation which provides the specific configuration information of each meter as programmed in the MCMS. The information shall be clearly identified as supporting documentation for the configuration of the device. The provision of configuration information may be satisfied through the use of an alternate electronic display such as a laptop or a PC connected to the MCMS. If an MCMS has more than one configuration, all approved configurations specific to that model shall be on the nameplate. If an MCMS has the same configuration for each meter, the applicable configuration can be the only one to appear on the nameplate. In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed on the terminal cover on condition that this same information also appears elsewhere on the meter itself. In such a case, as a minimum, the serial number affixed on the meter itself shall be visible when the meter is installed. Meters approved with nameplate information not legible from the front of the meter shall be approved for installation only on the load side of the main switch or circuit breaker of the service for which the meter is installed. This installation restriction will be contained in the Notice of Approval If the meter is fitted with accessories such as a reverse running detent or retransmitting contacts, this shall be specified on the nameplate or on an auxiliary plate, and a diagram of connections shall be provided.

19 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 19 of Subsection 6-4 is amended and subsections 6-5 to 6-13 are added to include additional performance requirements for active, reactive and apparent energy meters as follows: Basic metering equations. Unless otherwise noted, all equations apply to fundamental frequency components only. Watts: WW = VV XX II cccccc θθ Vars: vvvvvv = VV XX II sin θθ Volt-ampere (vectorial): VVVV vvvvvvvvvvvvvvvvvv = WW 2 + vvvvvv 2 where: V = voltage I = current θ = phase angle between voltage and current fundamental waveforms 6-5 Performance requirements for reactive energy meters Reactive energy used in calculating apparent energy shall be measured directly and not calculated from other legal units of measure Reactive energy allocated by direction or quadrant Var hours delivered recorded by the meter may be allocated into a register identified as Varh q1 where that reactive energy was applied concurrently with watt hours delivered. Varh q1 shall be established by the following equation: vvvvvv h qq1 = WW pp + WW pp 2WW pp vvvvvv pp + vvvvvv pp dddd Var hours delivered recorded by the meter may be allocated into a register identified as Varhr q2 where that reactive energy was applied concurrently with watt hours received. Varhr q2 shall be established by the following equation: vvvvvv h qq2 = WW pp WW pp 2WW pp vvvvvv pp + vvvvvv pp dddd Var hours received recorded by the meter may be allocated into a register identified as Varh q3 where that reactive energy was applied concurrently with watt hours received. Varh q3 shall be established by the following equation: vvvvvv h qq3 = WW pp WW pp 2WW pp vvvvvv pp vvvvvv pp dddd 2

20 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 20 of Var hours received recorded by the meter may be allocated into a register identified as Varh q4 where that reactive energy was applied concurrently with watt hours delivered. Varh q4 shall be established by the following equation: vvvvvv h qq4 = WW pp + WW pp 2WW pp vvvvvv pp vvvvvv pp dddd No reactive energy allocated to a given varh register shall be recorded in any other varh registers. 6-6 Performance requirements for apparent energy meters - General Meters shall establish apparent energy based on continuous measurement of active and reactive energy flow in all directions Meters shall establish apparent energy registration on the basis of the performance requirements specified for active and reactive energy and the following formula for apparent power: where: VA v = apparent vector power VVVV vv = WW 2 + vvvvvv The following formula shall be the basis of all meter algorithms for apparent energy: VVVVhrr = VVVV vv dddd Polyphase meters shall establish apparent energy on the basis of coincident active and reactive energy determined by the meter on a per phase basis. The following equations are provided as examples in the application of metering a 3-phase 4-wire wye service: Watts: WW = VV XX II cccccc θθ Polyphase watts: WW pp = VV aa XX II aa cccccc θθ aa + VV bb XX II bb cccccc θθ bb + VV cc XX II cc cccccc θθ cc Vars: vvvvvv = VV XX II sin θθ Polyphase vars: vvvvvv pp = VV aa XX II aa sin θθ aa + VV bb XX II bb sin θθ bb + VV cc XX II cc sin θθ cc Volt-ampere vectorial: VVVV vv = WW 2 + vvvvvv 2

21 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 21 of 46 Polyphase volt-ampere vectorial: VVVV PP,vv = WW PP 2 + vvvvvv PP 2 Polyphase volt-ampere energy: VVVVh = WW PP 2 + vvvvvv PP 2 dddd where: V = voltage I = current θ = phase angle between voltage and current fundamental waveforms In the case of polyphase services other than 3-phase 4-wire wye, the meter equations shall similarly establish the watt and var polyphase quantities and then apply the vectorial VA equation in above The applicant shall provide documentation which supports the algorithm used to establish apparent energy registration. 6-7 Performance requirements for apparent energy meters under unbalanced loads Polyphase meters shall be assessed for performance under unbalanced polyphase loads. The applied test current shall be such that each phase is subject to a value different than the other one or two (as applicable) phases. Similarly, the power factor for each phase shall be set to a value different from the other one or two (as applicable) phases. Errors shall not exceed +/-0.75% while any current value from minimum to maximum is applied and at any power factor between 0.5 lead and 0.5 lag. 6-8 Performance requirements for apparent energy meters allocated by direction Apparent energy recorded by the meter shall be allocated into a register identified as VAh (del) where that apparent energy was applied concurrently with watt hours delivered. In addition, the var energy used to calculate VAh shall also be coincident with watt hours delivered The value for fundamental VAh (del) shall be established on the basis of the following equation: VVVVh (dddddd) = WW 2 dddddd + (vvvvvv qq1 + vvvvvv qq4 ) 2 dddd Apparent energy recorded by the meter shall be allocated into a register identified as VAh (rec) where that apparent energy was applied concurrently with watt hours received. In addition, the var energy used to calculate VAh shall also be coincident with watt hours received The value for fundamental VAh (rec) shall be established on the basis of the following equation:

22 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 22 of 46 VVVVh (rrrrrr) = WW 2 rrrrrr + (vvvvvv qq2 + vvvvvv qq3 ) 2 dddd No apparent energy pursuant to shall be recorded in a VAh (rec) register and no apparent energy pursuant to shall be recorded in a VAh (del) register. 6-9 Directional quantities for active energy Directional quantities for active energy shall be determined on the basis of the following equations: WW dddddd = EEEE cos θθ ffffff 0 < θθ < 90 dddddddddddddd oooo 270 < θθ < 360 dddddddddddddd WW rrrrrr = EEEE cos θθ ffffff 90 < θθ < 270 dddddddddddddd 6-10 Energy meter performance under harmonic influence General Energy meters shall register energy only on the basis of fundamental frequency. Registration shall be within specified tolerances for non-sinusoidal load conditions containing voltage and current harmonic content as defined in section below Active energy meter performance requirements under harmonic influence Watt hour energy meter registration shall not exceed specified tolerance under the influence of harmonic conditions simulated by the following non-sinusoidal waveforms: (a) 90-degree phase fired waveform (b) Quadriform waveform (c) Peaked waveform (d) Pulsed waveform (e) Severe voltage pulse waveform (f) Even harmonic waveform (g) Integral cycle load control test waveform

23 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 23 of 46 Unless otherwise noted, harmonic test waveforms shall be generated at amplitudes having an error not greater than 1% of the fundamental or 25% of the test harmonic amplitude Test waveforms are defined by the following general equations: where: n = harmonic number II pp = I test φφ nn = harmonic phase I test = 25% I max where: n = harmonic number VV pp = V rated θθ nn = harmonic phase NN II = II pp sin(nn2ππ60tt + φφ nn ) NN nn=1 VV = VV pp sin(nn2ππ60tt + θθ nn ) nn=1 Note: All test waveforms resulting from a combination of harmonic and fundamental content shall not exceed times the meter's maximum rating for voltage or current respectively A 90-degree phase fired test waveform shall be applied to the current circuits of the meter while a sinusoidal voltage at rated voltage and the fundamental frequency shall be applied to the voltage circuits. The phase fired current test waveform is zero from 0 to 90 degrees, 50% of I max from 90 to 180 degrees, zero from 180 to 270 degrees, and 50% of I max from 270 to 360 degrees. The current test waveform and information regarding the generation of this waveform can be found in ANSI C12.20 (where: I test = 25% of I max and Iref = 50% of I max ) Waveforms comprising harmonics having a phase and amplitude indicated in the table below shall be applied to the voltage and current circuits of the meter.

24 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 24 of 46 Quadriform waveform parameters Quadriform waveform harmonic number Current amplitude %I test Current phase angle Voltage amplitude %V rated Voltage phase angle 1 100% 0 100% % 0 3.8% % 0 2.4% % 0 1.7% % 0 1.0% % 0 0.8% Waveforms comprising harmonics having a phase and amplitude as defined in the table below shall be applied to the voltage and current circuits of the meter. Peaked waveform parameters Harmonic number Current amplitude %I test Current phase angle Voltage amplitude %V rated Voltage phase angle 1 100% 0 100% % % % 0 2.4% % % % % % 0 0.8% Waveforms comprising harmonics having a phase and amplitude as indicated in the table below shall be applied to the voltage and current circuits of the meter.

25 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 25 of 46 Pulsed waveform parameters Harmonic number Current amplitude %I test Current phase angle Voltage amplitude %V rated Voltage phase angle Meters shall be subject to a voltage waveform defined by the parameters shown in the table below. The value of I test shall be such that the peak current resulting from the sum of the current waveforms identified below does not exceed the peak of I max at the fundamental frequency. Severe voltage waveform parameters Harmonic number Current amplitude %I test Current phase angle Voltage amplitude %V rated Voltage phase angle

26 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 26 of Meters shall be subject to a voltage waveform defined by the parameters shown in the table below and a sinusoidal current waveform at I test. Even harmonic test waveform parameters Harmonic Voltage amplitude Phase Current amplitude Phase Energy % V rated % I test Meters shall be subject to a sinusoidal waveform at rated voltage and current waveforms defined by the parameters in the table below. Multiple zero crossing current parameters Harmonic Voltage amplitude % V rated Phase Current amplitude % I test Phase Energy ± 1 90 ± ± ± ± ± ± ± ± 3 50 ± Meters shall be subject to a voltage waveform defined by the parameters shown in the table below and a sinusoidal current waveform at I test. Multiple zero crossing voltage waveform parameters Harmonic Voltage amplitude % V rated Phase Current amplitude % I test Phase Energy ± ± ± ± Meters shall be subject to an integral cycle load control waveform test using a sinusoidal voltage waveform and a current waveform as follows:

27 Category: ELECTRICITY Provisional Specification: PS-E-18 Page: 27 of 46 (a) The current waveform shall have amplitude two times higher than I test and shall be asinusoidal signal at the fundamental frequency which is switched on and off every second period. (b) The measured energy using the test waveform current shall be compared with energy from reference waveforms at I test Limits of error Except for the case of VA rms hr meters, errors shall be established on the basis of registration of the fundamental content only (e.g. 60 Hz sine wave) Meters subjected to the 90-degree phase-fired test waveform described under shall register energy with an error not exceeding +/-0.8% For any test condition indicated in the tables of clauses to , the meter registration shall not exceed +/-0.6% error For any test condition indicated in the tables of clauses or , the meter registration shall not exceed +/-0.5% error Meters subjected to the integral cycle load control waveform test described under shall register energy with an error not exceeding +/-1.5% Reactive energy meter performance under harmonic influence General Var hour energy meters shall register energy only on the basis of the fundamental frequency. Registration shall be within specified tolerances for applicable non-sinusoidal load conditions containing voltage and current harmonic content as defined in the clauses of above and below Performance requirements under harmonic influence Var hour energy meter registration shall not exceed specified tolerance under the influence of harmonic conditions simulated by the following non-sinusoidal waveforms: (a) Quadriform waveform (b) Peaked waveform (c) Pulsed waveform Unless otherwise noted, harmonic test waveforms shall be generated at amplitudes having an error not greater than 1% of the fundamental or 25% of the test harmonic amplitude.